<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>点名系统</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-color: #f0f8ff;
        }
        .container {
            background-color: #ffffff;
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
            text-align: center;
            width: 80%;
            max-width: 500px;
        }
        h1 {
            margin-bottom: 30px;
            font-size: 2.5em;
            color: #333333;
        }
        form {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        label {
            margin-bottom: 10px;
            font-size: 1.25em;
            color: #555555;
        }
        input[type="text"] {
            padding: 15px;
            margin-bottom: 20px;
            width: 100%;
            max-width: 400px;
            font-size: 1.2em;
            border: 1px solid #cccccc;
            border-radius: 10px;
        }
        button {
            padding: 15px 30px;
            font-size: 1.2em;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        button:hover {
            background-color: #45a049;
        }
    </style>
</head>
<body>
<div class="container">
    <h1>点名系统</h1>
    <form action="/submit" method="POST">
        <label for="name">请输入姓名：</label>
        <input type="text" id="name" name="name" required>
        <button type="submit">提交</button>
    </form>
</div>
</body>
</html>
